The conduction electrons in a cylindrical, current-carrying wire have a drift velocity of 0.35 mm/s. The wire has a radius of 1.0 mm and contains 8.6 x 1028 conduction electrons per m3. What is the current in the wire? (The magnitude of the charge of an electron is 1.602 x 10-19 c.) O a. 3.0 A

The conduction electrons in a cylindrical, current-carrying wire have a drift velocity of 0.35 mm/s. The wire has a radius of 1.0 mm and contains 8.6 x 1028 conduction electrons per m3. What is the current in the wire? (The magnitude of the charge of an electron is 1.602 x 10-19 c.) O a. 3.0 A

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter27: Current And Resistance

Section: Chapter Questions

Problem 27.4OQ

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Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

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Expert Solution

Step 1

Given

Drift velocity v_d= 0.35 mm/s

= 0.35 × 10^-3m/s

Radius of wire r = 1 mm = 10^-3m

Number of electron per unit volume

n = 8.6 × 10²⁸election/m³

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